define resistivity and state its SI unit. does its value vary with temperature?
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the resistivity of a conductor is defined as the resistance of a conductor of unit length and unit Area of its cross section .the si unit is ohm metre yes resistivity is vary by its temperature
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resistivity is the resistance offered by a conductor of unit length and unit cross sectional area.
S.I. unit is ohm metre.
resistivity changes with respect to temperature
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